Supplemental Cash Flow Information details - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Interest Paid, Capitalized	$ 8,308	$ 12,040
Interest Paid	41,918	31,661
Income Taxes Paid, Net	95,065	78,519
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	9,062	24,499
Capital Expenditures Incurred but Not yet Paid	$ 7,255	$ 17,395